Quick reference

Create scaling groups

The following table lists operations for first-time setup.

Item	User guide	API reference	Description
Scaling group	Create scaling groups	CreateScalingGroup	Create scaling groups to manage ECS instances or elastic container instances.
Scaling configuration	Create a scaling configuration (ECS instance) Create a scaling configuration (ECI instance)	CreateScalingConfiguration CreateEciScalingConfiguration	Required if you do not specify an instance configuration source when creating a scaling group. Supports ECS instances and elastic container instances.
Scaling rule	Create a scaling rule	CreateScalingRule	Control instance counts in scaling groups, or adjust minimum and maximum instance limits.
Lifecycle hook	Create a lifecycle hook	CreateLifecycleHook	Instances involved in scale-outs or scale-ins enter the Pending Add or Pending Remove state. Perform custom operations before the hooks time out.
Scheduled task	Create a scheduled task	CreateScheduledTask	Schedule automatic scale-outs or scale-ins at specified times.
Event-triggered task	Create an event-triggered task	CreateAlarm	Enable metric-based dynamic scaling.

View scaling groups

The following table lists operations for querying scaling group details.

Item	User guide	API reference	Description
Scaling group	View or modify scaling groups	DescribeScalingGroups	Query basic configurations of existing scaling groups.
Instance list	View instances in a scaling group	DescribeScalingInstances	Query instance details within a scaling group.
Scaling rule	Evaluate a predictive scaling rule	N/A	Check whether predictions from a predictive scaling rule meet expectations.
Event-triggered task	View event-triggered tasks	DescribeAlarms	View trigger rules, monitoring data, and metric trends for an event-triggered task.
Scaling activity	View scaling activity details	DescribeScalingActivities DescribeScalingActivityDetail	View execution results of scaling activities triggered by scheduled or event-triggered tasks.
Scaling group monitoring	View instance count changes in a scaling group View the monitoring metrics of instances in a scaling group	N/A	View instance count changes across states to track resource utilization over time. View aggregated ECS instance metrics—CPU utilization, memory usage, load, disk, and network—across the scaling group.

Manage scaling groups

The following table lists operations for managing scaling resources.

Item	User guide	API reference	Description
Scaling group	Suspend and resume scaling group processes Enable or disable scaling groups	SuspendProcesses ResumeProcesses EnableScalingGroup DisableScalingGroup	Suspend or resume processes in a scaling group to control which functional processes run. Scaling only works in the Enabled state. Disable scaling groups you do not currently need.
Instance list	Manually add instances to a scaling group Manually change instance states Rebalance ECS instances	AttachInstances EnterStandby ExitStandby SetInstancesProtection RebalanceInstances	Manually add existing instances to maximize utilization of computing resources. Switch instance states—Standby, Protected, or Stopped (Economical Mode only)—based on operational needs. Rebalance instances across zones when distribution becomes uneven.
Scaling configuration	Manage scaling configurations	N/A	Once applied, Auto Scaling uses this configuration to create instances during scale-outs. Export configurations for backup or import them into other scaling groups. Import configurations from another scaling group to avoid manual recreation.
Scaling rule	Execute a scaling rule	ExecuteScalingRule	Execute scaling rules manually or automatically.
Scheduled task	Disable a scheduled task	N/A	Re-enable a disabled scheduled task to resume execution. Disable scheduled tasks you do not currently need.
Event-triggered task	Disable or enable an event-triggered task	EnableAlarm DisableAlarm	Re-enable a disabled event-triggered task. Disable event-triggered tasks you do not currently need.

Modify scaling groups

The following table lists operations for modifying scaling resources.

Item	User guide	API reference	Description
Scaling group	View or modify scaling groups	ModifyScalingGroup	Modify scaling group parameters when requirements change.
Scaling configuration	Manage scaling configurations Update image in a scaling configuration	ModifyScalingConfiguration ModifyEciScalingConfiguration	Modify scaling configurations to meet new requirements. Update images in scaling configurations manually or enable automatic image updates.
Scaling rule	Modify or delete a scaling rule	ModifyScalingRule	Modify scaling rule parameters when requirements change.
Lifecycle hook	Modify or delete a lifecycle hook	ModifyLifecycleHook	Modify lifecycle hook parameters when requirements change.
Scheduled task	Configure scheduled tasks	ModifyScheduledTask	Modify scheduled task parameters when requirements change.
Event-triggered task	Modify or delete an event-triggered task	ModifyAlarm	Modify event-triggered task parameters, including adding or removing trigger rules.

Delete scaling groups

The following table lists operations for deleting scaling resources.

Item	User guide	API reference	Description
Scaling group	Delete scaling groups	DeleteScalingGroup	Deleting a scaling group also removes its configurations and rules. Delete unused groups to free up quota.
Instance list	Manually remove or delete instances	DetachInstances RemoveInstances	Remove or delete instances you no longer need from scaling groups.
Scaling configuration	Manage scaling configurations	DeleteScalingConfiguration DeleteEciScalingConfiguration	Delete unused scaling configurations to free up quota.
Scaling rule	Modify or delete a scaling rule	DeleteScalingRule	Delete unused scaling rules to free up quota.
Lifecycle hook	Modify or delete a lifecycle hook	DeleteLifecycleHook	Delete unused lifecycle hooks to free up quota.
Scheduled task	Configure scheduled tasks	DeleteScheduledTask	Delete unused scheduled tasks to free up quota.
Event-triggered task	Modify or delete an event-triggered task	DeleteAlarm	Delete unused event-triggered tasks to free up quota.